Tire tool



Dec. 22, 1942. M. MAHLER 2,305,886

TIRE TOOL Fild April 15, 1941 INVENTOR MAX MAHLEK 'BY .1 1/! H ORNEYPatented Dec. 22, 1942 I mosses "nan .roor.

Max Mahler, Newark, N. .L, assignor of one-halt to Bernard Mahler,Linden, N. .i'.

Y AppiicationAprll 15, 1941, Serial No..388,618

. 1 Claim.

This invention relates to improvements in tire breaking tools and moreparticularly to a tire breaking tool adapted for use in connection with"drop center rims.

Wheel rims of the drop center" type are provided with portions designedto receive the tire casing beads, to which the tire casing tenaciouslyadheres so that it becomes dimcult to break the tire from the rim forrepair or replacement. r

Wheel rims of recent development present an even greater problem in thebreaking of the tire from the rim, as such rims are popularly providedwith peripheral humps or shoulders defining the saddle and V drop centerportions of the rim. These rims are popularly called safety rims for thereason that, upon inflation of the tire, the casing bead snaps into thesaddle portion where it is maintained in position even though deflationoccurs, by the peripheral "humps or shoulders thus decreasing the riskof the tire being mangled or thrown from the wheel when a blowoutoccurs.

The object of my invention is to provide a tire breaking toolincorporating novel features providing increased leverage and facilityof insertion for the breaking of the tire from the drop center rim. Afurther object of my invention is to provide a tire breaking tool whichmay be readily-adapted for use, with equal efflcacy, in connection withtire rims. of varying diameters.

,Theseand other advantageous objects, which will later appear, areaccomplishedby the simple and practicalconstruction, combination, andarrangement of parts hereinafter described and exhibited in theaccompanying drawing, in

which: 1

Fig. 1 is a perspective view of a tire breaking tool embodying myinvention,

Fig. 2 is a perspective view showing the device of nrv invention in itsposition of initial application to a wheel, A

Fig. 3 is a similar view showing the second step in the application ofthe device of my invention to a wheel, and

Fig. 4 is a similar view showing the final step in the application ofthe device of my invention in the breaking of a tire from the rim of thewheel.

Referring to the drawing, wherein like reference numerals indicate likeparts, the tire breaking tool of my invention is shown to comprise anelongated bar II! which is preferably of upwardly tapered outline, theupper end H serving reenforcing rib l2 rib being likewise tapered towardthe handle II.

as a handle in the application of the device (presently described ingreater detail) the bar being preferably provided with a medialupstanding at the rear face thereof, said plained. The anchoring memberit is secured to the plate I5 by means of a flexible or other connectingmedium I9 which will provide for the free manipulation and rotation ofthe anchoring member l6 relative to the plate I5. In the particular formof my invention illustrated in the drawing, 'the connecting medium isshown to consist of a plurality of links I!) preferably secured to theplate l5 and anchoring'member l6 by being passed through suitableapertures therein as shown in Fig. 1. The plate I5 is provided withmeans to provide a pivotal bearing for the bar ID; in the formillustrated in the drawing this pivotal bearing means consists of aplurality of apertures l6 for the reception of a pin 20 which, as willbecome apparent from an inspection of Figs. 1 and 2 of the drawing,serves as a pivot bearing for the bar 10. The pin is positioned in theparticular aperture 18' required to accommodate the device to thediameter of the wheel in connection with which the device is to be used.

The lower end- 21 of the bar 10 is ofiset and tapered and terminates ina bifurcated wedge shaped portion 22 with spaced, wedge shaped studs 23and. The bar III is further provided with a laterally depending andoffset arm 25 terminating in an arcuately disposed head 26.

The devices of my invention may be made of any suitable material; I havefound it advantageous to make the same of relatively inexpensive alloysbut it may be made of any other desired or convenient materials.

As will be noted from an inspection of the drawing, the device isreenforced by the ribs l2, ll at those portions which are subjected togreat strains in the normal use of the device.

Figs. 2-4 illustrate the manner of application and use of the device ofmy invention, which will now be related in greater detail.

The device of my invention is designed primarily for usein connectionwith "drop center" rims. Preliminary to the application of the tool ofmy invention, the valve core of the tire is removed and the tiredeflated. The anchoring member i8 is positioned, as shown in Fig. 2,over the rim flange 21, and the pin 20 is inserted in the appropriateaperture it of the plate IS. with the bar I positioned angularly on therim, the bifurcated lower portion 22 thereof resting against the rimflange 21 at a point diametrically opposite that at which the anchoringmember I6 is positioned over the rim flange 21. In tilting the bar i9outwardlyas in Fig. 3, the bar tilts and bears against the pin 20 withthe anchoring member l8 providing a bearing; the bifurcated end 22 ofthe bar is forced intermediate the tire and rim until said end 22 restsupon the saddle portion 28 of the rim as in Fig. 3. It is then merelynecessary to tilt the bar I0 laterally as indicated by the arrow in Fig.4, to break the tire from the rim. The stud 23, bearing against the rimprovides a fulcrum point; the stud 24 breaks the tire bead from the rim,the head 26 of the offset arm 25 of the bar it] cooperating in thebreaking of the tire from the rim.

It will be noted from the foregoing that with the device of myinvention, the breaking of a tire from a drop center rim is reduced to arelatively simple and rapid operation requiring a minimum of time andeffort. The device is adapted admirably for the breaking of tires fromrims of a drop center" type, which operation heretofore has beenextremely difficult.

While it is possible to use the tool without the anchoring means l8 orwith a different type of anchoring means, I have found the anchoringmeans I 6 of advantage in attaining the highest efliciency in the use ofthe tool of my invention,

Having thus described my invention, what I claim as new and desire tosecure by Letters Patof insertion of the offset portion of the bar, and

means for flexibly connecting the anchoring member to the plate. 7

